Spach's evening primrose (Oenothera spachiana)

Spach's evening primrose

Spach's evening primrose is a perennial herb known for its large, fragrant yellow flowers that bloom in the evening to attract pollinators. Its tall, erect stems and lance-shaped leaves are adapted to dry, open habitats. The plant's resilience is remarkable, thriving in well-drained soils with full sun exposure, indicating an evolved drought tolerance.

Scientific classification

Species

Spach's evening primrose (Oenothera spachiana)

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Perennial

Lifespan

Herb

Plant Type

Images of Spach's evening primrose

Care Guide for Spach's evening primrose

Every week

Water

Full sun

Sunlight

20 - 35 ℃

Ideal Temperature

Water: Spach's evening primrose is drought tolerant, suitable for xeriscaping, and dislikes waterlogging. In pots, water deeply once a week, avoiding excess moisture to prevent root rot. Outdoors, water deeply after spring planting and occasionally during dry summers; natural rainfall suffices annually.

Fertilize: Spach's evening primrose requires minimal fertilization and can thrive in poor soil. For vigorous growth and flowering, mix organic fertilizer and humus with the substrate before planting. Use a liquid fertilizer high in phosphorus and potassium biweekly to enhance flowering.

Pruning: Spach's evening primrose features vibrant blooms and fast growth. Prune in early spring, cutting no more than one-third to maintain size. Use sharp tools to prevent disease. Regular pruning enhances air circulation, minimizes pests, and boosts flowering. Follow local guidelines for climate-specific care.

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